Hvad absorberer ved 1370 cm⁻¹ i et FTIR-spektrum?
Et bånd nær 1370 cm⁻¹ kan pege på flere funktionelle grupper. Nedenfor er de mest sandsynlige tildelinger, rangeret efter hvor meget publiceret bevis der understøtter hver — hver enkelt spores til litteratur (DOI) og krydsvalideres mod vores 130.000+ referencespektre og vidensgraf.
Backed by 8 cited sources
Hurtigt svar
Et bånd nær 1370 cm⁻¹ fortolkes normalt ved at kontrollere, hvilke funktionelle grupper der gentagne gange forekommer der i litteraturen, og derefter bekræfte mindst en eller to yderligere peaks i den samme prøve. Denne side rangerer disse tildelinger efter akkumuleret evidens snarere end efter en enkelt fast lærebogsregel.
Mulige funktionelle gruppetildelinger
| Funktionel gruppe | Understøttende fakta | Citerede kilder | Højeste tillid |
|---|---|---|---|
| Alkyl C-H | 47 | 45 | 1,0 |
| Methacrylate | 20 | 19 | 1,0 |
| Acetate | 20 | 19 | 1,0 |
| Amide | 18 | 18 | 1,0 |
| Methoxy (OCH3) | 16 | 15 | 1,0 |
| C-O single bond | 14 | 13 | 1,0 |
| Carbohydrate | 12 | 12 | 1,0 |
| Hydroxyl (O-H) | 11 | 10 | 1,0 |
| Secondary amine | 9 | 9 | 1,0 |
| C n single bond | 9 | 9 | 1,0 |
| Carboxyl (COOH) | 6 | 6 | 1,0 |
| Carbonyl (C=O) | 6 | 6 | 1,0 |
| Ketone | 5 | 5 | 1,0 |
| Ester | 5 | 5 | 1,0 |
| Methyl | 4 | 4 | 1,0 |
| Aromatic ring | 3 | 3 | 1,0 |
| Carbonate | 3 | 3 | 1,0 |
| Lignin | 3 | 3 | 1,0 |
| Water (H2O) | 2 | 2 | 1,0 |
| Lipid | 2 | 2 | 1,0 |
| Protein | 2 | 2 | 1,0 |
| N h | 2 | 2 | 1,0 |
| Alkene (C=C) | 2 | 1 | 1,0 |
| Boron nitrogen | 1 | 1 | 1,0 |
| Fluorine (C-F) | 1 | 1 | 1,0 |
| Ring structure | 1 | 1 | 1,0 |
| Nitrate | 1 | 1 | 1,0 |
| C=n | 1 | 1 | 1,0 |
| Nucleic acid | 1 | 1 | 1,0 |
| Phosphate (PO4) | 1 | 1 | 1,0 |
| C c single bond | 1 | 1 | 1,0 |
| Silanol (Si-OH) | 1 | 0 | 1,0 |
| Silicon (Si) | 1 | 0 | 1,0 |
Rangering afspejler akkumuleret litteraturevidence, ikke en enkelt fast regel. Bekræft altid mod din prøvekontekst.
Mulige materialer
| Materiale | Understøttende toppe | Overlappende grupper | Citerede kilder |
|---|---|---|---|
| Chitosan | 1370, 1650, 1655 | Alkyl C-H, Amide, Acetate | 1 |
| Cellulose | 1370, 1735, 1650 | Alkyl C-H, Acetate, Methacrylate | 1 |
| SiO2 | 1370, 1739, 699 | Alkyl C-H | 1 |
| polyaniline | 1370, 1565, 1570 | Amide, Alkyl C-H, Methacrylate | 1 |
| Polyvinyl Alcohol | 1370, 1141, 1640 | Alkyl C-H, Methacrylate, Acetate | 1 |
Materialer vises kun, når den samme litteraturpulje understøtter dette bånd og mindst en yderligere karakteristisk top.
Spektrumlogik
Dette bånd bliver meningsfuldt kun, når det læses sammen med sine nabotoppe. I praksis ser analytikere først på tildelingerne ovenfor, og kontrollerer derefter, om den samme prøve også viser andre toppe, der forventes for det samme strukturelle motiv. Et enkelt bånd nær 1370 cm⁻¹ er normalt ikke nok til materialeidentifikation alene.
Anvendelse i virkeligheden
Denne type forespørgsel er almindelig ved polymeridentifikation, screening af ukendt plast, fejlfinding i kvalitetskontrol, verifikation af genanvendt materiale og litteraturunderstøttet gennemgang af peak-tildeling.
Almindelige fejl
- Behandling af et isoleret bånd som bevis på et materiale uden at kontrollere mindst en eller to understøttende toppe.
- Ignorerer overlap: flere funktionelle grupper kan bidrage nær samme bølgetal.
- Spring validering over, når additiver, blandinger, oxidation eller forurening kan forvrænge spektret.
Verifikationsrådgivning
Når tvetydighed fortsat består, valider hypotesen med DSC, GC-MS eller TGA, især for blandinger, nedbrudte prøver og fyldte polymerer.
Litteratur bag disse tildelinger
-
Carbohydrate tillid 1,0
“microfibrils.Thepreferred pulpcharacteristicsfor paper productionare Moreover, the characteristic bands for amorphous cellulose at the presence of long fibres with a large diameter that provide me897cm-1, 1273cm-1, 1370cm-1 1430cm-1 and in”
Exploring the lignolytic potential of a new laccase producing strain Kocuria sp. PBS-1 and its application in bamboo pulp bleaching DOI: 10.1016/j.ibiod.2019.104726 -
Alkyl C-H tillid 1,0
“polysaccharide band, and the CH band at 1370 Th e PCA results show that the clay and light fraction spectra changed during laboratory incubation (Fig.”
Calderon 等 - 2011 - Chemical Differences in Soil Organic Matter Fracti DOI: 10.2136/sssaj2009.0375 -
Amide tillid 1,0
“A second amide vibration cm-1 cm-1 appeared at 1420 (C-H stretch), and an amide peak appeared at 1370 (C-H cm-1 stretch).”
Classification and identification of Rhodobryum roseum Limpr. and its adulterants based on fourier-transform infrared spectroscopy (FTIR) and chemometrics DOI: 10.1371/journal.pone.0172359 -
Alkyl C-H tillid 1,0
“zinc ions, confirmed also by the percentage removal of The peaks at 1370 and cm-1 around 1230 can be due to symmetric vibrations of -CH and of C-O single bond 3”
Study of Polyvinyl Alcohol-SiO2 Nanoparticles Polymeric Membrane in Wastewater Treatment Containing Zinc Ions DOI: 10.3390/polym13111875 -
C-O single bond tillid 1,0
“vera, with the FTIR revealing peaks at 1739.94 cm (C O stretching vibration), 1370 = -1 1H (deformation of the H-C-OH bonds), and 1370 cm (C-O-C asymmetric stretching vibration);”
Chou 等 - 2023 - Potential of methacrylated acemannan for exerting DOI: 10.1186/s12906-023-04022-8 -
Alkyl C-H tillid 1,0
“Furthermore, the amide characteristic bands were clearly clearly visible at υ = 1655 and 1604 cm-1 in the spectrum, whereas the CH bands throughcm-1 υ visible at = 1655 and 1604 in the spectrum, whereas the CH bands throughout the CS out th”
Chitosan Capped Copper Oxide Nanocomposite: Efficient, Recyclable, Heterogeneous Base Catalyst for Synthesis of Nitroolefins DOI: 10.3390/catal12090964 -
tillid 1,0
“vibration stretching appears at 1370 and 1010 The function groups related to the cm-1, PANI are located at 3401, 2918, 1105 for N-H, C-H, C-N aromatic, respectively.”
Conversion of Sewage Water into H2 Gas Fuel Using Hexagonal Nanosheets of the Polyaniline-Assisted Deposition of PbI2 as a Nanocomposite Photocathode with the Theoretical Qualitative Ab-Initio Calculation of the H2O Splitting DOI: 10.3390/polym14112148 -
Carbohydrate tillid 1,0
“cm-1 that the peak around wavelength 1370 appeared This result is in agreement with and analysis FTIR XRD due to modified cellulose, the peak refers to EFB C-H 2327”
Jahi 等 - 2020 - Empty Fruit Bunch Cellulose based Sorbent for Oil DOI: 10.17576/jsm-2020-4909-29
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